Window-lock.



J. F. SYDOW.

WINDOW LOCK.

APPLIOATION FILED SEPT. 2, 1909.

.957, 124 Patented May 3, 1910.

633866665, 1 27206-72; @W .3 I 2 I "W JOHN F. SYDOW, OF GATESVILLE, TEXAS.

WINDOW-LOCK.

Specification of Letters Patent.

Patented May 3, 19 10.

Application filed September 2, 1909. Serial No. 515,782.

T 0 all whom it may concern:

Be it known that I, JOHN F. SYDow, a citizen of the United States, residing at Gatesville, in the county of Coryell and State of Texas, have invented new and useful Improvements in Vindow-Locks, of which the following is a specification.

The present invention is an improvement in window locks, and it resides, primarily, in the production of an extremely simple and inexpensive device arranged for attach ment to a. window sash of ordinary construction for the purpose of effectively holding the sash in position at any desired point in its travel.

Briefly described, the device comprises a pair of locking bars secured to a two-armed spring member which in turn is fastened to the sash, the pressure of the spring tending to force the bars into alinement with each other, thereby causing the outer ends of said bars to bind tightly against the side members of the window frame.

The invention also comprehends the production of means for simultaneously releasing the bars from the above described frictional engagement with the window frame, to which end there is provided a slide rod whose upper end is fastened to the central portion of a bridge piece by means of which said bars are connected together. The lower end of this rod is bent to provide an operating handle.

The preferred embodiment of the invention is illustrated in the accompanying drawings, wherein:

Figure l is a front elevation of a window having one sash thereof equipped with the improved lock, and Fig. 2 is an enlarged perspective view of the lock detached from the sash.

Reference being had to said drawings, and to the numerals marked thereon, l designates generally the window frame, and 2 and 3, respectively, the upper and lower sashes which slide therein in the usual man ner.

The locking device is preferably applied, as shown, to the lower sash, and it consists solely of a pair of bars 4 of wood or other suitable material, and a spring member 5, the latter element being in the form of a fiat strip 6 of spring metal provided centrally of its front or outer edge with a de pending tongue 7. This strip is designed to rest flat upon the upper face of the top rail 8 of the sash, with its tongue extending across the front faces of said rail and the vertical crossrail 9, to which latter said tongue is secured by means of suitable fastening devices.

The two locking bars 4 are attached to the metal strip 6 in the manner shown in Fig. 2, that is to say, the end port-ions of said strip are screwed or otherwise fastened flat against the lower faces of said bars, the ends of which latter project beyond the corresponding terminals of the strip. It will thus be seen that the locking device is somewhat T-shaped, its two arms being the bars l, connected to the spring strip 6, and its stem the tongue 7, the resilience of the strip tending to force said bars into alinenient with each other. The normal distance between the outer ends of said bars, however, is greater than the width of the sash, and for this reason it will be obvious that when the device is attached to the sash as shown in Fig. 1, the bars cannot lie flat upon the sash rail 8, but will be inclined toward each other. Consequently, their outer ends will be caused to bind tightly against the side members of the window frame, and to increase the extent of the binding surface or area, the ends in question of the bars are slightly beveled. Therefore, when the bars have been released from such binding engagement with the window frame by being moved inwardly, the sash may be raised or lowered at will, and when the pressure upon the bars incidental to their inward movement has been removed, said bars will move outwardly or away from each other under the spring pressure, and will again grip the frame, thereby holding the sash in adjusted position.

To effect the above described release of the bars from engagement with the frame, they are connected together adjacent their inner ends by a flexible bridge piece 10 in the form of a metal rod, the ends of which are inserted in or otherwise affixed to the bars. This bridge piece is in turn engaged by an operating rod 11 formed at its upper end with an eye 12 through which the bridge passes, and at its lower end with a handle 13. Rod 11 is arranged longitudinally of the vertical cross-rail 9 and extends through staples or similar guides 14 attached to the tongue 7 and the above mentioned rail. The provision of the bridge and operating rod thus enables the locking bars to be released from engagement with the frame by moving said rod upwardly, whereupon the flexion of the bridge will have the effect of drawing the bars upwardly and inwardly into the position shown in dotted lines in Fig. 1.

Vhat is claimed is:

1. In a sash fastener, the combination of a spring member comprising a flat metal strip, and an attaching tongue formed integral therewith said strip being adapted to rest upon the upper rail of a sash; and a pair of locking members attached to the ends of said strip.

2. In a sash fastener, the combination of a spring member adapted for attachment to the sash; a pair of locking members carried by the spring member at its opposite ends and adapted to bind against the window frame at their outer ends under the pressure of said spring member; a flexible connection between said locking members; and means for flexing said connection, to release said locking members from engagement with said frame.

3. In a sash fastener the combination of a fiat spring strip provided with a tongue adapted for attachment to the sash; a pair of locking members carried by said strip at its opposite ends and adapted to bind at their outer ends against the window frame under the spring pressure of the strip; a bridge-piece connecting said locking members; and a slidable rod connected to said bridge for flexing the same to release said locking members from engagement with I said frame.

4. A sash fastener comprising in combination a flat spring strip adapted for attachment to the sash and to rest upon the upper rail thereof; and a pair of locking bars carried by said strip at its opposite ends and adapted to bind against the window frame at their outer ends under the spring pressure of said strip.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

JOHN F. SYDOIV lVitnesses Gr. C. PYLAN'r N. PEDERSON. 

